CVE-2021-47668 - CVE House
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Status published Unknown CVE-2021-47668

can: dev: can_restart: fix use after free bug

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: can: dev: can_restart: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the netif_rx_ni() in: stats->rx_bytes += cf->len; Reordering the lines solves the issue.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
39549eef3587f1c1e8c65c88a2400d10fd30ea17, 2.6.31, 0, 4.4.254, 4.9.254, 4.14.218, 4.19.171, 5.4.93, 5.10.11, 5.11

Timeline

Official Publish: April 17th, 2025
Last Modified: May 11th, 2026
Added to House: July 21st, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.